This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 2 | 1 |
| 3 | 5 |
| 4 | 22 |
| 5 | 54 |
| 6 | 134 |
| 7 | 269 |
| 8 | 534 |
| 9 | 934 |
| 10 | 1618 |
| 11 | 2573 |
| 12 | 4062 |
| 13 | 6030 |
| 14 | 8902 |
| 15 | 12549 |
| 16 | 17614 |
| 17 | 23854 |
| 18 | 32194 |
| 19 | 42229 |
| 20 | 55238 |